Power-operated hammer.



W. S. PAYNE.

POWER OPER/WED HAMMER.

APPLICATION FILED MAR. 23.1915,

Patented Oct. 26, 1.915.

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WALTER. s. PAYNE, or UNIVERSITY PLACE, NEBRASKA.

p rownnfornnAinn HAMMER.

Specification of Letters Patent.

- 1F.atented Unt. 26, 1915.,

.Application fi1ed March 23, 1915. Serial No. 16,389.

power operated hammers of the reciprocatory type. A

i Ahn important object of the invention is to provide apparatus of the above mentioned character, formed of parts which are readily separable for the purpose of cleaning and repairing them.' 1

A further object of the invention is to provide apparatus of the above mentioned character, which is strong, and durable.

Otherv objects and advantages 'of the invention will be apparent during the course of the following description. v

In the accompanying drawings forming a part of this specification and in which like numerals are employed to designate like parts throughout the same, Figure 1 1s a central longitudinal sectional View through apparatus embodying my invention, Fig. 2 is a transverse section taken on line 2-2 of Fig. 1, and, Fig. 3 is a side elevation of the coupling-plug.v p

My improved hammer comprises a preferably cylindrical casing 5, formed of detachable casing sectionsv 6 and 7,' arranged in end to end relation, as shown. The forward casing section 7 preferably has a portion of its surface milled, as shown lat 8. The casing section 7 is provided at its forward end with catory tool or chisel 10. This tool orchisel is preferably provided with a longitudinal groove or recess 11, receiving a screw 12, which prevents the tool from dropping out of the sleeve 9, as shown. The casing section 6 is provided at its rear end with interior screw-threads for engaging with an exteriorly' screw-.threaded annular flange 12', carried by a cap or head 13, serving to close lthe rear end of the casing section 6, as shown. This cap 13 is providedwith a central aperture 14, as shown.

The numeral 15 designates .a couplingplug which is preferably cylindrical and provided with exterior screw-threads, as shown at 16, for engaging with interior screwthreads formed upon the adjacent endszof tel a reduced guide sleeve 9, receiving a recipro' the casing sections 6 and 7. Tn this manner the casing sections 6 and 7 are detachablyand securelyheldtogetheni Mounted to reciprocate within the forward casing 7`is a plunger-hammer 17,v the forward end of which is adapted to strike the rear end of the tool 10. This 'plungerhammer is provided with preferably diametrically oppositely arranged arms 18,

preferably integral therewith, such arms be ing mounted to slide within longitudinal` openings 19 formed in the plug 15, as shown. The plunger-hammery 17 is provided 4in its rear portion with 'an axially extending preferably cylindrical recess or cavity 20, receiving suitably stifl" compressible and eXpan sible coil spring or springs 21, the rear end ofwhich is mounted within a recess 22, formed inthe plug 15, as shown. The plunger-hammer is provided in its forward end with a screw-threaded opening 20, re-

head 22 which engages the spring or springs 21. At its forward end the plug 21 is pro-V vided With a transverse `opening orv notch 23 for receiving a suitable tool for turning it, passed through an opening 24C. The screw-threaded plug 21 is adapted to be locked against rotation by clamping screws 25. The function Vof this screwthreaded plug is to adjust the tension of' the spring or springs 21. Arranged within the opening or cavity 24 is a hard steel block 26 normally held in place by clamping screws ceiving a screw-threaded plug 21, `having a 27 or the like. This hard steel block is disposed to impinge against the end ofthe tool 10, as shown.

The numeral 23 designates a rotatable driving lshaft journaled in the aperture'14 in the cap 13.

engaging with Ithe head 13. The forward Rigidly mounted upon the. driving shaft 23 is-a thrust ring 24, slidably end of the driving shaft,23 extends into a recess 25formed in the coupling-plug 15,

and engages therein a thrust ball bearing 26,

as shown. Itis4 thus apparent that the shaft 23 Vis free to'rotate but cannot partake of perceptible longitudinal movement with re' lation to the casing 5. Slidably mounted upon the driving shaft 23 is a reciprocatory cam 27 rigidly attached to the rear ends of the arms 18, as shown at 28. This cam is provided with an inclined surface 29 and a trip shoulder 30. The reciprocatory cam 27 is engaged and moved by a rotatable cam 31, having an inclined surface 32 and a trip shoulder 33, as shown. The yrotatable cam 431 is rigidly mounted upon the drivingshaft 23 to be retained thereby. It is thus ap'- parent that upon the rotation of the cam 31 -in the direction of the'arrow, the same will move the reciprocatory cani 27 rearwardly,

which in turn draws the plimger ham'merl 17 rearwardly thereby placing the spring orsprings- 21 under tension. When the trip shoulders 30 and 33'come into alinement, the reciprocatory cam 'the spring or springs 21 to quickly throw or move the plunger-hammer 17 forwardly for 'shaft 23 by prefer to drive the chuck 36', having an opening to receive`the'l shaft -23 and rigidlysecured to the armature' shaft 34.

The casing of the motor is provided with a forwardly extending tubular'portion 37, adapted to be inserted within a clamp Icomprising longitudinal halves 38, secured together by bolts (not shown) passing through bolt holes 39.` The forward end of the clamp receives the rear end ofthe casing section 6, whereby the casing 5 is Vrigidly attached. tothe casing of the hammer 17. This plun In operation, the rotation of the shaft 34' is imparted to the shaft 23, in turn rotating the caml 31. This cam causesthe movement of the reciprocatorycam 2l, which, coperates with'the Aspring or springs 21 to effect a reciprocatory movement of the plungerer-hammer impinges against the rear-end o the tool 10 asis obvious. It is obvious thatthe casing section 6 may be readily removed from the clam halves 38,.and the casing sections 6 and 7 unscrewed from the coupling-plug 15, whereby thel several vparts may be separated for the purpose "of -cleaning or repairing.

It is to beundrstood that the form of my invention herewith shown and described is to be taken as a preferred example of the same, and that various changes inthe shape, size, and arrangement -of parts maybe resorted 4itowithout departing from the spirit of the invention or, the scope of the subjoinedclaims.-

Having thusv described' the invention, I claim; V .1. In'a hammer of the character described; forward and rear casing sections arranged in end to. end relation; a coupling- -A plug arranged `within the adjacent ends of the casing sections and serving to secure them together; a reciprocatory plungerhammer mounted within 27 is' released,` allowing the forward' casing section in advance of the coupling-plug; a compressible coil s ring arranged between the forward end of) the coupling-plug and the plunger-hammer; a driving rotatable shaftv mounted within the rear casing section and held therein against longitudinal movement; a reci rocatory cam slidably mounted upon'. the driving shaft and connected with the plunger-hammer; and a rotatable cam secured to the driving shaft to rotate therewith and engaging the first named cam. f

2. In a hammer of the character described; forward and rear casing sections arranged in end to end relation; a couplingplug arranged within the adjacent ends of the casing sections for securing them together and providedwith longitudinal openings; a reciprocatory plunger-hammer mounted within the forward casing section in advance of the coupling-plug and carrying rearwardly extending arms mounted to reciprocate in saidopenings; a compressible coil spring arranged between the couplingplug and plunger-hammer; a driving shaft rotatably -mounted within the rear casing section; a reciprocatory cani slidably mounted upon the driving shaft and connected with th'e arms; and a rotatable cam secured to the driving shaft to turn therewith and engaging the reciprocatory cam.

3. In `a hammer of the .character described; an exteriorl screw-threaded coupling-plug having lbngitudinal openings formed therethrough; a forward casing section provided at its rear end with interior screw-threads to engage with the couplingplug and provided at its forward end with a tool receiving member; a rear casing section provided at its forward end with interior screw-threads for engaging the couplingplug; a plunger-hammer mounted to reciprocate within the forward casing section i andY rovided withfarms extending through the ongitudinal openings; a compressible coil spring arranged between the couplin plug andplunger-hammer; a driving sha t rotatably mounted -within the rear casing sectiong'a reciprocatory cam 'mounted to slide upon the drivin shaft and rigidly attached to the rear ends of said arms; and a rotatable `'cam rigidly mounted upon the driving shaft and arranged in advance of the reciprocatory\ cam to operate it.

In a hammer of `the character described; a rear casing section; a couplingplug secured within the forward end thereof'and projecting outwardly beyond the same for a substantial distance' and havin longitudinal openings and a substantially centrally arranged journal recess; a cap detachably connected with the rear end of the rear casing section and rovided with a ]ournal opening; a rotata le driving shaft arranged within the journal openings; a thrust element rigidly secured to the driving shaft and engaging with the cap; a reger-hammer and coupling-plug; and a forciprocatory cam slidably mounted upon the ward casing receiving the plunger-hammer driving shaft; 'a rotatable cam rigidly and engaging with the cou ling-plug. mounted upon the driving shaft and arlin testimony whereof agix my signature t ranged in aldvanee of the reciprocatory cam in presence of two witnesses.

a plungerammer disposed in advance o the cams and having arms passing through l WALTER S' PAYNE' the openings of the coupling-plug and se- "Witnesses: cured to the reciprocatory cam; a compres- CECIL C. GATES,

M sible coil spring arranged between the plun- Planer W. HART' 

